166211317 has 8 divisors (see below), whose sum is σ = 177129216. Its totient is φ = 155601072.

The previous prime is 166211303. The next prime is 166211323. The reversal of 166211317 is 713112661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166211317 - 2¹¹ = 166209269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166211387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75798 + ... + 77959.

It is an arithmetic number, because the mean of its divisors is an integer number (22141152).

Almost surely, 2^166211317 is an apocalyptic number.

It is an amenable number.

166211317 is a deficient number, since it is larger than the sum of its proper divisors (10917899).

166211317 is a wasteful number, since it uses less digits than its factorization.

166211317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153827.

The product of its digits is 1512, while the sum is 28.

The square root of 166211317 is about 12892.2968085598. The cubic root of 166211317 is about 549.8195738760.

Adding to 166211317 its reverse (713112661), we get a palindrome (879323978).

The spelling of 166211317 in words is "one hundred sixty-six million, two hundred eleven thousand, three hundred seventeen".